Article
Testing mechanisms of Bergmann's rule: phenotypic decline but no genetic change in body size in three passerine bird populations.
The American naturalist - 1 Aug 2011
Husby Arild, Hille Sabine M, Visser Marcel E
Abstract excerpt
Bergmann's rule predicts a decrease in body size with increasing temperature and has much empirical support. Surprisingly, we know very little about whether "Bergmann size clines" are due to a genetic response or are a consequence of phenotypic plasticity. Here, we use data on body size (mass and tarsus length) from three long-term (1979-2008) study populations of great tits (Parus major) that experienced a...
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